The Korea Exchange (KRX) was created through the integration of the three existing Korean spot & futures exchanges (Korea Stock Exchange, Korea Futures Exchange & KOSDAQ).
The main index is the KOSPI.
The Korean Composite Stock Price Index is the main tracking index. The KOSPI Index is comprised of 200 of the largest and most liquid issues traded on the Korean Stock Exchange. The index is market capitalization weighted, meaning that firms with the largest market value have the greatest influence on the KOSPI's returns. The preferred shares are excluded in calculating the KOSPI Index.